I can genuinely hypnotise flies. As in hypnotised enough so I can squish them with the tip of my finger. Young flies seem to have inbuilt anti-hypnotic protection, but bigger flies like blue bottles don't stand a chance.

As per seadog, I can hear bats. I can also hear when the breadmaker and tumble dryer beep, something that amazes my wife continually. One beer, however, and my hearing goes to pot, plus I'm no good at picking out sounds/speech from a noisy bar.

Anyway, I can always pick the wrong queue to stand in a supermarket. not particularly useful unless you enjoy standing behind someone who doesn't seem to understand how to use money or how to operate their wallet/purse